Yes mate I know they are one way adjustable, when I said fully customisable I meant that if you are not happy with the set up you send them back, you change the springs or the inner bits and you end up with a completely different
suspension.This is the main difference of these kits with an off shelve kit
Well if you don't use the car on the road much you shouldn't have any issues whatsoever, this kit will probably transform the car on track. I did know that on the R3 the fronts are stiffer but tbh I don't know why. Different cars, different setups, different weights...who knows..
The droop travel is actually how much the wheel drops when the car is lifted in the air. These kits have very little travel anyway, AST has 80mm only therefore you would expect the droop travel to be relatively small. Again, you don't need droop travel on track because you are dealing with smooth surfaces, hence the way these kits are built, but on the streets is different. The car can easily lose traction should you drive fast over a bump, and if you are going fast and you are turning at the same time...well...it could end up quite badly...
I'm sure you'll love the kit mate, it's money well spent!!